Re: [Repeater-Builder] Information on Spectrum Communications SCR-1000
I've also found some documentation that I'll send along with the hardware. Am pretty busy with pre-XMAS running around so it will be a little while before I can get this stuff to you. Bruce In a message dated 12/2/2008 10:50:13 P.M. Pacific Standard Time, [EMAIL PROTECTED] writes: That would be great. Please let me know what I owe you for the shipping and the like. Keith Foor 6758 Johnstown Utica Rd Johnstown, Oh 43031 **Make your life easier with all your friends, email, and favorite sites in one place. Try it now. (http://www.aol.com/?optin=new-dpicid=aolcom40vanityncid=emlcntaolcom0010)
Re: [Repeater-Builder] Information on Spectrum Communications SCR-1000
That would be great. Please let me know what I owe you for the shipping and the like. Keith Foor 6758 Johnstown Utica Rd Johnstown, Oh 43031 - Original Message - From: [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Sunday, November 23, 2008 1:55 PM Subject: Re: [Repeater-Builder] Information on Spectrum Communications SCR-1000 I no longer have any Spectrum documentation but I do have a collection of original boards for the SCR-1000 that I'll be glad to send you if you think you can make use of them in restoring it. Bruce K7IJ In a message dated 11/22/2008 9:13:55 P.M. Pacific Standard Time, [EMAIL PROTECTED] writes: I have an SCR-1000 that was being used as a local repeater and then was replaced. I am looking for information on the control circuits, how to program the IDer, a service and or users manual and any other info I can find. The unit is VHF (not sure if that matters). There have been a number of modifications done to this unit that need to be removed and the unit put back to it's out of box configuration if possible. I thank you for any help you may be able to provide. Keith KB8VUL -- One site has it all. Your email accounts, your social networks, and the things you love. Try the new AOL.com today! -- No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.175 / Virus Database: 270.9.9/1807 - Release Date: 11/23/2008 10:59 AM
Re: [Repeater-Builder] Information on Spectrum Communications SCR-1000
After reviewing the transmitter schematic (yeah, I found it) it seems that the audio feeds rather directly into the trans with little filtering. It might make a good packet radio at 9600 even. Anyway, my guess is that this is due to the PL encode coming in that line and it needing to pass it on correctly, of course the ability of it creating spurs with this design is also fairly evident. - Original Message - From: Paul Plack To: Repeater-Builder@yahoogroups.com Sent: Sunday, November 23, 2008 2:01 AM Subject: Re: [Repeater-Builder] Information on Spectrum Communications SCR-1000 These repeaters got a bad reputation in part because of hams who tuned them be peaking rather than using the procedure in the manual. The PA was fairly efficient, but not unconditionally stable, and could produce spurs if not properly tuned. One other issue was the combination of Spectrum repeater and ACC controller, which was once a very common setup. One of the busier systems in Atlanta in the 80's used this combo, and despite proper tuning, it was incredible dirty, with spurs at regular frequency intervals. Many hairs were torn out until it was discovered that the ACC's digital clocking noise passed down the PTT line was actually modulating the exciter. From my point of view, that's a boo/hiss on both ACC and Spectrum. 73, Paul, AE4KR - Original Message - From: Mike Reed To: Repeater-Builder@yahoogroups.com Sent: Saturday, November 22, 2008 11:44 PM Subject: Re: [Repeater-Builder] Information on Spectrum Communications SCR-1000 I have one of those critters also, but no book. Spectrum wants a small fortune for it. As for the ID unit, it is a burned chip that is not really available. I would suggest an after market one. That is what I know so far... 73 Mike - N7ZEF - Original Message - From: Keith Foor [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, November 20, 2008 1:02 PM Subject: [Repeater-Builder] Information on Spectrum Communications SCR-1000 I have an SCR-1000 that was being used as a local repeater and then was replaced. I am looking for information on the control circuits, how to program the IDer, a service and or users manual and any other info I can find. The unit is VHF (not sure if that matters). There have been a number of modifications done to this unit that need to be removed and the unit put back to it's out of box configuration if possible. I thank you for any help you may be able to provide. Keith KB8VUL Yahoo! Groups Links -- No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.175 / Virus Database: 270.9.9/1805 - Release Date: 11/22/2008 10:34 AM
Re: [Repeater-Builder] Information on Spectrum Communications SCR-1000
I no longer have any Spectrum documentation but I do have a collection of original boards for the SCR-1000 that I'll be glad to send you if you think you can make use of them in restoring it. Bruce K7IJ In a message dated 11/22/2008 9:13:55 P.M. Pacific Standard Time, [EMAIL PROTECTED] writes: I have an SCR-1000 that was being used as a local repeater and then was replaced. I am looking for information on the control circuits, how to program the IDer, a service and or users manual and any other info I can find. The unit is VHF (not sure if that matters). There have been a number of modifications done to this unit that need to be removed and the unit put back to it's out of box configuration if possible. I thank you for any help you may be able to provide. Keith KB8VUL **One site has it all. Your email accounts, your social networks, and the things you love. Try the new AOL.com today!(http://pr.atwola.com/promoclk/10075x1212962939x1200825291/aol?redir=http://www.aol.com/?optin=new-dp %26icid=aolcom40vanity%26ncid=emlcntaolcom0001)
[Repeater-Builder] Information on Spectrum Communications SCR-1000
I have an SCR-1000 that was being used as a local repeater and then was replaced. I am looking for information on the control circuits, how to program the IDer, a service and or users manual and any other info I can find. The unit is VHF (not sure if that matters). There have been a number of modifications done to this unit that need to be removed and the unit put back to it's out of box configuration if possible. I thank you for any help you may be able to provide. Keith KB8VUL
Re: [Repeater-Builder] Information on Spectrum Communications SCR-1000
I have one of those critters also, but no book. Spectrum wants a small fortune for it. As for the ID unit, it is a burned chip that is not really available. I would suggest an after market one. That is what I know so far... 73 Mike - N7ZEF - Original Message - From: Keith Foor [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, November 20, 2008 1:02 PM Subject: [Repeater-Builder] Information on Spectrum Communications SCR-1000 I have an SCR-1000 that was being used as a local repeater and then was replaced. I am looking for information on the control circuits, how to program the IDer, a service and or users manual and any other info I can find. The unit is VHF (not sure if that matters). There have been a number of modifications done to this unit that need to be removed and the unit put back to it's out of box configuration if possible. I thank you for any help you may be able to provide. Keith KB8VUL Yahoo! Groups Links
Re: [Repeater-Builder] Information on Spectrum Communications SCR-1000
These repeaters got a bad reputation in part because of hams who tuned them be peaking rather than using the procedure in the manual. The PA was fairly efficient, but not unconditionally stable, and could produce spurs if not properly tuned. One other issue was the combination of Spectrum repeater and ACC controller, which was once a very common setup. One of the busier systems in Atlanta in the 80's used this combo, and despite proper tuning, it was incredible dirty, with spurs at regular frequency intervals. Many hairs were torn out until it was discovered that the ACC's digital clocking noise passed down the PTT line was actually modulating the exciter. From my point of view, that's a boo/hiss on both ACC and Spectrum. 73, Paul, AE4KR - Original Message - From: Mike Reed To: Repeater-Builder@yahoogroups.com Sent: Saturday, November 22, 2008 11:44 PM Subject: Re: [Repeater-Builder] Information on Spectrum Communications SCR-1000 I have one of those critters also, but no book. Spectrum wants a small fortune for it. As for the ID unit, it is a burned chip that is not really available. I would suggest an after market one. That is what I know so far... 73 Mike - N7ZEF - Original Message - From: Keith Foor [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, November 20, 2008 1:02 PM Subject: [Repeater-Builder] Information on Spectrum Communications SCR-1000 I have an SCR-1000 that was being used as a local repeater and then was replaced. I am looking for information on the control circuits, how to program the IDer, a service and or users manual and any other info I can find. The unit is VHF (not sure if that matters). There have been a number of modifications done to this unit that need to be removed and the unit put back to it's out of box configuration if possible. I thank you for any help you may be able to provide. Keith KB8VUL Yahoo! Groups Links
Re: [Repeater-Builder] Information on Spectrum Communications SCR-1000
How about the 15KHz coming down the audio lines? ACC also had a situation where they took a 15KHz clock pulse train from the microprocessor circuitry, amplified it with an LM386 audio amp, rectified it, filtered it, and used it as the raw negative voltage supply into the negative voltage regulator that fed all of the audio stages. I was an inventive and elegant way to generate a negative voltage from a positive supply. Until the filter caps dried out. Then you had a 15khz square wave modulation impressed on top of the repeater transmitter and link transmitter (actually the remote base) audio. The average ham monitoring the channel never heard it, BUT THE REPEATER INPUTS 15KHz AWAY DID. There was a spur every 15khz up and down the band (the amount of spectrum that was trashed depended on the cavity filters of the duplexer, if any). The solution? Replace EVERY electrolytic cap in the entire ACC controller with quality parts rated at 75 degrees C (if not 85 degrees C). I did several controllers, and told several other controller owners about the problem and they fixed their own boxen. Funny thing - the average stock Motorola and GE repeater station owner didn't have a problem because the splatter filters (that were designed in from the factory) just wouldn't let 15KHz through. Mike WA6ILQ At 11:01 PM 11/22/08, you wrote: These repeaters got a bad reputation in part because of hams who tuned them be peaking rather than using the procedure in the manual. The PA was fairly efficient, but not unconditionally stable, and could produce spurs if not properly tuned. One other issue was the combination of Spectrum repeater and ACC controller, which was once a very common setup. One of the busier systems in Atlanta in the 80's used this combo, and despite proper tuning, it was incredible dirty, with spurs at regular frequency intervals. Many hairs were torn out until it was discovered that the ACC's digital clocking noise passed down the PTT line was actually modulating the exciter. From my point of view, that's a boo/hiss on both ACC and Spectrum. 73, Paul, AE4KR - Original Message - From: mailto:[EMAIL PROTECTED]Mike Reed To: mailto:Repeater-Builder@yahoogroups.comRepeater-Builder@yahoogroups.com Sent: Saturday, November 22, 2008 11:44 PM Subject: Re: [Repeater-Builder] Information on Spectrum Communications SCR-1000 I have one of those critters also, but no book. Spectrum wants a small fortune for it. As for the ID unit, it is a burned chip that is not really available. I would suggest an after market one. That is what I know so far... 73 Mike - N7ZEF - Original Message - From: Keith Foor mailto:[EMAIL PROTECTED][EMAIL PROTECTED] To: mailto:Repeater-Builder@yahoogroups.comRepeater-Builder@yahoogroups.com Sent: Thursday, November 20, 2008 1:02 PM Subject: [Repeater-Builder] Information on Spectrum Communications SCR-1000 I have an SCR-1000 that was being used as a local repeater and then was replaced. I am looking for information on the control circuits, how to program the IDer, a service and or users manual and any other info I can find. The unit is VHF (not sure if that matters). There have been a number of modifications done to this unit that need to be removed and the unit put back to it's out of box configuration if possible. I thank you for any help you may be able to provide. Keith KB8VUL Yahoo! Groups Links
